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Diffstat (limited to 'src/w32image.c')
| -rw-r--r-- | src/w32image.c | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/src/w32image.c b/src/w32image.c new file mode 100644 index 00000000000..70b2eb29b87 --- /dev/null +++ b/src/w32image.c @@ -0,0 +1,477 @@ +/* Implementation of MS-Windows native image API via the GDI+ library. + +Copyright (C) 2020 Free Software Foundation, Inc. + +This file is part of GNU Emacs. + +GNU Emacs is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or (at +your option) any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */ + +/* Written by Juan Jose Garcia-Ripoll <juanjose.garciaripoll@gmail.com>. */ + +#include <config.h> +#include "lisp.h" +#include "dispextern.h" +#define COBJMACROS +#ifdef MINGW_W64 +/* FIXME: Do we need to include objidl.h? */ +#include <objidl.h> +#endif +#include <wtypes.h> +#include <gdiplus.h> +#include <shlwapi.h> +#include "w32common.h" +#include "w32term.h" +#ifdef WINDOWSNT +#include "w32.h" /* for map_w32_filename, filename_to_utf16 */ +#endif +#include "frame.h" +#include "coding.h" + +#ifdef WINDOWSNT + +typedef GpStatus (WINGDIPAPI *GdiplusStartup_Proc) + (ULONG_PTR *, GdiplusStartupInput *, GdiplusStartupOutput *); +typedef VOID (WINGDIPAPI *GdiplusShutdown_Proc) (ULONG_PTR); +typedef GpStatus (WINGDIPAPI *GdipGetPropertyItemSize_Proc) + (GpImage *, PROPID, UINT *); +typedef GpStatus (WINGDIPAPI *GdipGetPropertyItem_Proc) + (GpImage *, PROPID, UINT, PropertyItem *); +typedef GpStatus (WINGDIPAPI *GdipImageGetFrameDimensionsCount_Proc) + (GpImage *, UINT *); +typedef GpStatus (WINGDIPAPI *GdipImageGetFrameDimensionsList_Proc) + (GpImage *, GUID *, UINT); +typedef GpStatus (WINGDIPAPI *GdipImageGetFrameCount_Proc) + (GpImage *, GDIPCONST GUID *, UINT *); +typedef GpStatus (WINGDIPAPI *GdipImageSelectActiveFrame_Proc) + (GpImage*, GDIPCONST GUID *, UINT); +typedef GpStatus (WINGDIPAPI *GdipCreateBitmapFromFile_Proc) + (WCHAR *, GpBitmap **); +typedef GpStatus (WINGDIPAPI *GdipCreateBitmapFromStream_Proc) + (IStream *, GpBitmap **); +typedef IStream * (WINAPI *SHCreateMemStream_Proc) (const BYTE *, UINT); +typedef GpStatus (WINGDIPAPI *GdipCreateHBITMAPFromBitmap_Proc) + (GpBitmap *, HBITMAP *, ARGB); +typedef GpStatus (WINGDIPAPI *GdipDisposeImage_Proc) (GpImage *); +typedef GpStatus (WINGDIPAPI *GdipGetImageHeight_Proc) (GpImage *, UINT *); +typedef GpStatus (WINGDIPAPI *GdipGetImageWidth_Proc) (GpImage *, UINT *); + +GdiplusStartup_Proc fn_GdiplusStartup; +GdiplusShutdown_Proc fn_GdiplusShutdown; +GdipGetPropertyItemSize_Proc fn_GdipGetPropertyItemSize; +GdipGetPropertyItem_Proc fn_GdipGetPropertyItem; +GdipImageGetFrameDimensionsCount_Proc fn_GdipImageGetFrameDimensionsCount; +GdipImageGetFrameDimensionsList_Proc fn_GdipImageGetFrameDimensionsList; +GdipImageGetFrameCount_Proc fn_GdipImageGetFrameCount; +GdipImageSelectActiveFrame_Proc fn_GdipImageSelectActiveFrame; +GdipCreateBitmapFromFile_Proc fn_GdipCreateBitmapFromFile; +GdipCreateBitmapFromStream_Proc fn_GdipCreateBitmapFromStream; +SHCreateMemStream_Proc fn_SHCreateMemStream; +GdipCreateHBITMAPFromBitmap_Proc fn_GdipCreateHBITMAPFromBitmap; +GdipDisposeImage_Proc fn_GdipDisposeImage; +GdipGetImageHeight_Proc fn_GdipGetImageHeight; +GdipGetImageWidth_Proc fn_GdipGetImageWidth; + +static bool +gdiplus_init (void) +{ + HANDLE gdiplus_lib, shlwapi_lib; + + if (!((gdiplus_lib = w32_delayed_load (Qgdiplus)) + && (shlwapi_lib = w32_delayed_load (Qshlwapi)))) + return false; + + fn_GdiplusStartup = (GdiplusStartup_Proc) + get_proc_addr (gdiplus_lib, "GdiplusStartup"); + if (!fn_GdiplusStartup) + return false; + fn_GdiplusShutdown = (GdiplusShutdown_Proc) + get_proc_addr (gdiplus_lib, "GdiplusShutdown"); + if (!fn_GdiplusShutdown) + return false; + fn_GdipGetPropertyItemSize = (GdipGetPropertyItemSize_Proc) + get_proc_addr (gdiplus_lib, "GdipGetPropertyItemSize"); + if (!fn_GdipGetPropertyItemSize) + return false; + fn_GdipGetPropertyItem = (GdipGetPropertyItem_Proc) + get_proc_addr (gdiplus_lib, "GdipGetPropertyItem"); + if (!fn_GdipGetPropertyItem) + return false; + fn_GdipImageGetFrameDimensionsCount = (GdipImageGetFrameDimensionsCount_Proc) + get_proc_addr (gdiplus_lib, "GdipImageGetFrameDimensionsCount"); + if (!fn_GdipImageGetFrameDimensionsCount) + return false; + fn_GdipImageGetFrameDimensionsList = (GdipImageGetFrameDimensionsList_Proc) + get_proc_addr (gdiplus_lib, "GdipImageGetFrameDimensionsList"); + if (!fn_GdipImageGetFrameDimensionsList) + return false; + fn_GdipImageGetFrameCount = (GdipImageGetFrameCount_Proc) + get_proc_addr (gdiplus_lib, "GdipImageGetFrameCount"); + if (!fn_GdipImageGetFrameCount) + return false; + fn_GdipImageSelectActiveFrame = (GdipImageSelectActiveFrame_Proc) + get_proc_addr (gdiplus_lib, "GdipImageSelectActiveFrame"); + if (!fn_GdipImageSelectActiveFrame) + return false; + fn_GdipCreateBitmapFromFile = (GdipCreateBitmapFromFile_Proc) + get_proc_addr (gdiplus_lib, "GdipCreateBitmapFromFile"); + if (!fn_GdipCreateBitmapFromFile) + return false; + fn_GdipCreateBitmapFromStream = (GdipCreateBitmapFromStream_Proc) + get_proc_addr (gdiplus_lib, "GdipCreateBitmapFromStream"); + if (!fn_GdipCreateBitmapFromStream) + return false; + fn_GdipCreateHBITMAPFromBitmap = (GdipCreateHBITMAPFromBitmap_Proc) + get_proc_addr (gdiplus_lib, "GdipCreateHBITMAPFromBitmap"); + if (!fn_GdipCreateHBITMAPFromBitmap) + return false; + fn_GdipDisposeImage = (GdipDisposeImage_Proc) + get_proc_addr (gdiplus_lib, "GdipDisposeImage"); + if (!fn_GdipDisposeImage) + return false; + fn_GdipGetImageHeight = (GdipGetImageHeight_Proc) + get_proc_addr (gdiplus_lib, "GdipGetImageHeight"); + if (!fn_GdipGetImageHeight) + return false; + fn_GdipGetImageWidth = (GdipGetImageWidth_Proc) + get_proc_addr (gdiplus_lib, "GdipGetImageWidth"); + if (!fn_GdipGetImageWidth) + return false; + /* LOAD_DLL_FN (shlwapi_lib, SHCreateMemStream); */ + + /* The following terrible kludge is required to use native image API + on Windows before Vista, because SHCreateMemStream was not + exported by name in those versions, only by ordinal number. */ + fn_SHCreateMemStream = (SHCreateMemStream_Proc) + get_proc_addr (shlwapi_lib, "SHCreateMemStream"); + if (!fn_SHCreateMemStream) + { + fn_SHCreateMemStream = (SHCreateMemStream_Proc) + get_proc_addr (shlwapi_lib, MAKEINTRESOURCEA (12)); + if (!fn_SHCreateMemStream) + return false; + } + + return true; +} + +# undef GdiplusStartup +# undef GdiplusShutdown +# undef GdipGetPropertyItemSize +# undef GdipGetPropertyItem +# undef GdipImageGetFrameDimensionsCount +# undef GdipImageGetFrameDimensionsList +# undef GdipImageGetFrameCount +# undef GdipImageSelectActiveFrame +# undef GdipCreateBitmapFromFile +# undef GdipCreateBitmapFromStream +# undef SHCreateMemStream +# undef GdipCreateHBITMAPFromBitmap +# undef GdipDisposeImage +# undef GdipGetImageHeight +# undef GdipGetImageWidth + +# define GdiplusStartup fn_GdiplusStartup +# define GdiplusShutdown fn_GdiplusShutdown +# define GdipGetPropertyItemSize fn_GdipGetPropertyItemSize +# define GdipGetPropertyItem fn_GdipGetPropertyItem +# define GdipImageGetFrameDimensionsCount fn_GdipImageGetFrameDimensionsCount +# define GdipImageGetFrameDimensionsList fn_GdipImageGetFrameDimensionsList +# define GdipImageGetFrameCount fn_GdipImageGetFrameCount +# define GdipImageSelectActiveFrame fn_GdipImageSelectActiveFrame +# define GdipCreateBitmapFromFile fn_GdipCreateBitmapFromFile +# define GdipCreateBitmapFromStream fn_GdipCreateBitmapFromStream +# define SHCreateMemStream fn_SHCreateMemStream +# define GdipCreateHBITMAPFromBitmap fn_GdipCreateHBITMAPFromBitmap +# define GdipDisposeImage fn_GdipDisposeImage +# define GdipGetImageHeight fn_GdipGetImageHeight +# define GdipGetImageWidth fn_GdipGetImageWidth + +#endif /* WINDOWSNT */ + +static int gdip_initialized; +static bool gdiplus_started; +static ULONG_PTR token; +static GdiplusStartupInput input; +static GdiplusStartupOutput output; + + +/* Initialize GDI+, return true if successful. */ +static bool +gdiplus_startup (void) +{ + GpStatus status; + + if (gdiplus_started) + return true; +#ifdef WINDOWSNT + if (!gdip_initialized) + gdip_initialized = gdiplus_init () ? 1 : -1; +#else + gdip_initialized = 1; +#endif + if (gdip_initialized > 0) + { + input.GdiplusVersion = 1; + input.DebugEventCallback = NULL; + input.SuppressBackgroundThread = FALSE; + input.SuppressExternalCodecs = FALSE; + + status = GdiplusStartup (&token, &input, &output); + if (status == Ok) + gdiplus_started = true; + return (status == Ok); + } + return false; +} + +/* This is called from term_ntproc. */ +void +w32_gdiplus_shutdown (void) +{ + if (gdiplus_started) + GdiplusShutdown (token); + gdiplus_started = false; +} + +bool +w32_can_use_native_image_api (Lisp_Object type) +{ + if (!w32_use_native_image_api) + return false; + if (!(EQ (type, Qjpeg) + || EQ (type, Qpng) + || EQ (type, Qgif) + || EQ (type, Qtiff) + || EQ (type, Qnative_image))) + { + /* GDI+ can also display BMP, Exif, ICON, WMF, and EMF images. + But we don't yet support these in image.c. */ + return false; + } + return gdiplus_startup (); +} + +enum PropertyItem_type { + PI_BYTE = 1, + PI_ASCIIZ = 2, + PI_USHORT = 3, + PI_ULONG = 4, + PI_ULONG_PAIR = 5, + PI_BYTE_ANY = 6, + PI_LONG = 7, + PI_LONG_PAIR = 10 +}; + +static double +decode_delay (PropertyItem *propertyItem, int frame) +{ + enum PropertyItem_type type = propertyItem[0].type; + unsigned long udelay; + double retval; + + switch (type) + { + case PI_BYTE: + case PI_BYTE_ANY: + udelay = ((unsigned char *)propertyItem[0].value)[frame]; + retval = udelay; + break; + case PI_USHORT: + udelay = ((unsigned short *)propertyItem[0].value)[frame]; + retval = udelay; + break; + case PI_ULONG: + case PI_LONG: /* delay should always be positive */ + udelay = ((unsigned long *)propertyItem[0].value)[frame]; + retval = udelay; + break; + default: + /* This negative value will cause the caller to disregard the + delay if we cannot determine it reliably. */ + add_to_log ("Invalid or unknown propertyItem type in w32image.c"); + retval = -1.0; + } + + return retval; +} + +static double +w32_frame_delay (GpBitmap *pBitmap, int frame) +{ + UINT size; + PropertyItem *propertyItem; + double delay = -1.0; + + /* Assume that the image has a property item of type PropertyItemEquipMake. + Get the size of that property item. This can fail for multi-frame TIFF + images. */ + GpStatus status = GdipGetPropertyItemSize (pBitmap, PropertyTagFrameDelay, + &size); + + if (status == Ok) + { + /* Allocate a buffer to receive the property item. */ + propertyItem = malloc (size); + if (propertyItem != NULL) + { + /* Get the property item. */ + GdipGetPropertyItem (pBitmap, PropertyTagFrameDelay, size, + propertyItem); + delay = decode_delay (propertyItem, frame); + if (delay <= 0) + { + /* In GIF files, unfortunately, delay is only specified + for the first frame. */ + delay = decode_delay (propertyItem, 0); + } + delay /= 100.0; + free (propertyItem); + } + } + return delay; +} + +static GpStatus +w32_select_active_frame (GpBitmap *pBitmap, int frame, int *nframes, + double *delay) +{ + UINT count, frameCount; + GUID pDimensionIDs[1]; + GpStatus status = Ok; + + status = GdipImageGetFrameDimensionsCount (pBitmap, &count); + frameCount = *nframes = 0; + *delay = -1.0; + if (count) + { + /* The following call will fill pDimensionIDs[0] with the + FrameDimensionTime GUID for GIF images, and + FrameDimensionPage GUID for other image types. Multi-page + GIF and TIFF images expect these values in the + GdipImageSelectActiveFrame call below. */ + status = GdipImageGetFrameDimensionsList (pBitmap, pDimensionIDs, 1); + status = GdipImageGetFrameCount (pBitmap, &pDimensionIDs[0], &frameCount); + if (status == Ok && frameCount > 1) + { + if (frame < 0 || frame >= frameCount) + status = GenericError; + else + { + status = GdipImageSelectActiveFrame (pBitmap, &pDimensionIDs[0], + frame); + *delay = w32_frame_delay (pBitmap, frame); + *nframes = frameCount; + } + } + } + return status; +} + +static ARGB +w32_image_bg_color (struct frame *f, struct image *img) +{ + Lisp_Object specified_bg = Fplist_get (XCDR (img->spec), QCbackground); + Emacs_Color color; + + /* If the user specified a color, try to use it; if not, use the + current frame background, ignoring any default background + color set by the image. */ + if (STRINGP (specified_bg) + ? w32_defined_color (f, SSDATA (specified_bg), &color, false, false) + : (w32_query_frame_background_color (f, &color), true)) + /* The user specified ':background', use that. */ + { + DWORD red = (((DWORD) color.red) & 0xff00) << 8; + DWORD green = ((DWORD) color.green) & 0xff00; + DWORD blue = ((DWORD) color.blue) >> 8; + return (ARGB) (red | green | blue); + } + return (ARGB) 0xff000000; +} + +int +w32_load_image (struct frame *f, struct image *img, + Lisp_Object spec_file, Lisp_Object spec_data) +{ + GpStatus status = GenericError; + GpBitmap *pBitmap; + Lisp_Object metadata; + + eassert (valid_image_p (img->spec)); + + /* This function only gets called if w32_gdiplus_startup was invoked + and succeeded. We have a valid token and GDI+ is active. */ + if (STRINGP (spec_file)) + { + const char *fn = map_w32_filename (SSDATA (spec_file), NULL); + wchar_t filename_w[MAX_PATH]; + filename_to_utf16 (fn, filename_w); + status = GdipCreateBitmapFromFile (filename_w, &pBitmap); + } + else if (STRINGP (spec_data)) + { + IStream *pStream = SHCreateMemStream ((BYTE *) SDATA (spec_data), + SBYTES (spec_data)); + if (pStream != NULL) + { + status = GdipCreateBitmapFromStream (pStream, &pBitmap); + IStream_Release (pStream); + } + } + + metadata = Qnil; + if (status == Ok) + { + /* In multiframe pictures, select the first frame. */ + Lisp_Object lisp_index = Fplist_get (XCDR (img->spec), QCindex); + int index = FIXNATP (lisp_index) ? XFIXNAT (lisp_index) : 0; + int nframes; + double delay; + status = w32_select_active_frame (pBitmap, index, &nframes, &delay); + if (status == Ok) + { + if (nframes > 1) + metadata = Fcons (Qcount, Fcons (make_fixnum (nframes), metadata)); + if (delay >= 0) + metadata = Fcons (Qdelay, Fcons (make_float (delay), metadata)); + } + } + + if (status == Ok) + { + ARGB bg_color = w32_image_bg_color (f, img); + Emacs_Pixmap pixmap; + + status = GdipCreateHBITMAPFromBitmap (pBitmap, &pixmap, bg_color); + if (status == Ok) + { + UINT width, height; + GdipGetImageWidth (pBitmap, &width); + GdipGetImageHeight (pBitmap, &height); + img->width = width; + img->height = height; + img->pixmap = pixmap; + img->lisp_data = metadata; + } + + GdipDisposeImage (pBitmap); + } + + if (status != Ok) + { + add_to_log ("Unable to load image %s", img->spec); + return 0; + } + return 1; +} |